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随着中国海水养殖业的迅猛发展,海水养殖废水排放量与日俱增,近海水域环境严重恶化。采用海水电池处理模拟海水养殖废水,以镁为电池负极,钛为电池正极。镁负极失去电子产生Mg~(2+),与废水中的NH_4~+、PO_4~(3-)结合生成磷酸铵镁(MgNH_4PO_4·6H_2O,MAP),将废水中的NH_4~+和PO_4~(3-)去除。结果表明,当pH为9.5,氮磷配比为1∶1.1时,氮的去除率可达85.34%,磷的去除率可达98.46%。利用正交实验研究pH、初始氨氮浓度、氮磷比和COD4个因素对氮磷去除的影响,氨氮初始浓度、COD分别对氮、磷的去除影响最大。多个电池串联时,总输出电压是各电池电压之和。
With the rapid development of China’s mariculture industry, the discharge of mariculture wastewater has been increasing day by day, and the environment in coastal waters has deteriorated. Sea water battery used to deal with simulated mariculture wastewater, magnesium as the battery anode, titanium anode for the battery. The negative electrode of magnesium lost the electron to produce Mg 2+ and combined with NH 4 + and PO 4 3- in the waste water to form magnesium ammonium phosphate (MgNH 4 PO 4 · 6H 2 O, MAP). The NH 4 + and PO 4 4- 3-) Remove. The results showed that when the pH was 9.5 and the N / P ratio was 1: 1.1, the removal rate of nitrogen reached 85.34% and the removal rate of phosphorus reached 98.46%. The effects of pH, initial concentration of ammonia nitrogen, nitrogen and phosphorus ratio and COD on the removal of nitrogen and phosphorus were studied by orthogonal experiment. The initial concentration of ammonia and COD had the strongest influence on the removal of nitrogen and phosphorus respectively. When multiple batteries are connected in series, the total output voltage is the sum of the battery voltages.